Pymol-Scripts/Pymol-script-repo — pull request #34 by hongbo-zhu-cn (2012-04-10 23:03:23+00:00)
Title: check python version before import subprocess

some users who are using old free pymol compilation complained that subprocess is not available. So I revised the code so that it checks python version before import subprocess. os.system is used if python version is lower than 2.4, when subprocess was introduced.